MediumChemistryHigh School (9–10)GeneralAtoms and Molecules › Molecules, Ions and FormulaeNumericalBoard Exam

How many atoms of hydrogen, nitrogen and oxygen are there in 2 HNO₃ and 3 H₂O taken together?

Try it on paper first. A hint, the key idea and the worked solution are here when you need them.

How many atoms of hydrogen, nitrogen and oxygen are there in $2\,\text{HNO}_3$ and $3\,\text{H}_2\text{O}$ taken together? How many atoms are there in all?

Need a reminder? The key ideaShow

A molecule is a group of atoms joined together. Its atomicity is the number of atoms in it. A small number after a symbol counts atoms in one molecule; a number in front counts molecules; a number after a bracket multiplies everything inside.

The worked solution

Have you tried it?

Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.

← All Problems

← Give the atomicity of each, and say whether it is monatomic, diatomic, triatomic or has more atoms.Each of these is a molecule. Say which are molecules of an element and which are molecules of a… →

More onAtoms and Molecules › Molecules, Ions and Formulae

Discussion (0)

Loading…

How many atoms of hydrogen, nitrogen and oxygen are there in 2 HNO₃ and 3 H₂O taken together?

The worked solution

Discussion (0)

Want to go further in Atoms and Molecules › Molecules, Ions and Formulae?